The large wind turbine was designed by Norwegian company Sway. Its buoyancy is due to the internally hollow tower support, and it will be anchored to the seabed to depths of several hundred metres with a single pipe.

The world would need 3.8 million wind turbines, each producing 5 megawatts, to provide 51 per cent of supply. A further 40 per cent would come from 49,000 large-scale, 300 MW CSP and solar photovoltaic.